JPH0423616B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a mold with an automatic molded product ejector.

Conventionally, a rubber elastic molded product made of silicone rubber or the like manufactured by an injection molding method or the like has been removed from a mold mainly by the following means.

Those that are performed manually by an operator Those that utilize the product ejecting mechanism of the mold Those that use an automatic ejecting machine However, in those that utilize the product ejecting mechanism of the mold, the product ejecting mechanism is as shown in Figure 5. Even if the extrusion member 1 is pushed out from the movable mold 2, the product 3
There is a drawback that only a portion of the product 3 is deformed and the product 3 cannot be completely released from the mold. In addition, 4 in the same figure
is a fixed mold, and 5 is an injection part provided on the fixed mold 4.

In order to eliminate this drawback, as shown in FIG. 6, an automatic take-out machine 8 having a suction pad 7 attached to a base plate 6 is used to suck and pull out the product 3, and at the same time, the product 3 is ejected by an extrusion member 1. Products that can be released from the mold have been developed. In a mold using such an automatic take-out machine 8, since the automatic take-out machine 8 only reciprocates between the movable mold 2 and the fixed mold 4,
If a so-called undercut is formed in the product 3, there is a drawback that it cannot be easily released from the mold.

In order to eliminate this drawback, as shown in FIG. 7, in the case where a so-called undercut portion 10 having a substantially U-shaped cross section is formed at the end of the product 9, the slide core 11 in the movable mold 2 is replaced with a fixed mold. A device has been developed in which the product 9 is released from the mold by pulling the product 9 back in the direction away from the movable mold 2 to reduce the distance between the intermediate molds 12 within the movable mold 2. However, in such a mold, when the middle mold 12 moves inward, the undercut portion 10 comes into close contact with the middle mold 12 and the product 9 also shrinks, so it is still not possible to reliably release the product 9 from the mold. Ta.

The present invention has been made in view of this point, and provides a mold with an automatic molded product ejector that can reliably release a rubber elastic molded product and improve productivity.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing a main part of an embodiment of the present invention. In the figure, 20 is a movable mold that is movably provided opposite to a fixed mold (not shown). Inside the movable mold 20, there is an undercut portion 22 of the molded product 21.
A middle mold 24 having a flange 23 that forms a flange 23 is provided. The diameter of the medium 24 can be expanded or contracted by a slide core 25 that slides inside it. In the vicinity of the movable mold 20, a base plate 26 is inserted between the movable mold 20 and the fixed mold when the movable mold 20 is separated from the fixed mold, and is reciprocated between the two.
is provided. The base plate 26 is controlled and operated by a drive mechanism (not shown). Two pairs of suction pads 27, 27 are attached to the base plate 26, which suction the molded product 21. For example, as shown in FIG. 2, the suction pads 27, 27 are formed by bending the middle part of a link 28 that connects each of the suction pads 27, 27, and connecting the suction pads 27 to the rod 30 of the air cylinder 29. , 27 can be freely adjusted.

As a mechanism for adjusting the interval between the suction pads 27, 27, as shown in FIG.
7 and 27 are attached to the ends of the racks 31 and 31 arranged in parallel, and the pinion gear 32 is installed between the racks 31 and 31.
It is also possible to use a device in which the spacing is adjusted by moving the racks 31, 31 in opposite directions with the help of the racks 31, 31 interposed therebetween.

According to the mold with the automatic molded product ejecting machine configured as described above, as shown in FIG. The base plate 26 is inserted between the fixed mold and the fixed mold. Next, the base plate 26 is moved forward and the suction pads 27, 27 are fixed to the molded product 21. Next, the slide core 25 is pulled back to reduce the diameter of the middle mold 24 and widen the gap between the suction pads 27, 27. As a result, as shown in Figure 1, the molded product 2
1 and the medium size 24 can be completely separated.
Thereafter, the base plate 26 is pulled back toward the fixed mold, and the molded product 21 having a predetermined shape can be easily released from the mold. As a result, productivity can be significantly improved.

As explained above, the mold with an automatic molded product ejector according to the present invention has remarkable effects such as being able to reliably release a rubber elastic molded product and improving productivity.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the main parts of an embodiment of the present invention, FIG. 2 is an explanatory diagram showing a suction pad spacing adjustment mechanism of the same embodiment, and FIG. 3 is an explanatory diagram showing a suction pad spacing adjustment mechanism. FIG. 4 is an explanatory diagram showing the operation of the mold with an automatic molded product ejecting machine according to the same example, and FIGS. FIG. 3 is an explanatory diagram showing a state in which the device is being taken out. 20... Movable mold, 21... Molded product, 22... Undercut portion, 23... Flange portion, 24... Medium size,
25...Slide core, 26...Base plate, 27
...Adsorption pad, 28...Link, 29...Air cylinder, 30...Rod, 31...Rack,
32...Pinion gear.

Claims (1)

[Claims] 1. A fixed mold having an injection part for injecting molded product material, a movable mold installed opposite to the fixed mold and abutting against and separating from the fixed mold, and a mold formed at the abutting part between the movable mold and the fixed mold. a molded product storage section, a base plate that is provided in a space between the movable mold and the fixed mold so as to be freely movable between the fixed mold and the movable mold; 1. A mold with an automatic molded product ejector, comprising at least one pair of suction pads that are movably provided in a direction extending outward from a central portion of a molded product accommodating portion.